diff --git a/downloader/trustedstate/trustedstate.go b/downloader/trustedstate/trustedstate.go
index 4e8f86d1..76039b06 100644
--- a/downloader/trustedstate/trustedstate.go
+++ b/downloader/trustedstate/trustedstate.go
@@ -3,3 +3,7 @@ package trustedstate
 type TrustedState struct {
 	Source string
 }
+
+func (t *TrustedState) Download() string {
+	return t.Source
+}
diff --git a/driver/l1infotree/l1infotree.go b/driver/l1infotree/l1infotree.go
index 30c9a96d..cc3cf4c6 100644
--- a/driver/l1infotree/l1infotree.go
+++ b/driver/l1infotree/l1infotree.go
@@ -5,6 +5,6 @@ package l1infotree
 type L1InfoTree struct {
 }
 
-func (l1it *L1InfoTree) Process() string {
+func (l1it *L1InfoTree) Drive() string {
 	return "L1InfoTree"
 }
diff --git a/syncer/syncer.go b/syncer/syncer.go
index a47a86e5..6604be93 100644
--- a/syncer/syncer.go
+++ b/syncer/syncer.go
@@ -1,8 +1,4 @@
 package syncer
 
-type Syncer interface {
-	// Start starts the syncer
-	Start() error
-	// Stop stops the syncer
-	Stop() error
+type Syncer struct {
 }